The Iron Hand (1916)

After political boss Tim Noland adopts Roy, the infant son of a dead crony, he reluctantly gives the boy up to a doctor who claims that, if raised in an respectable environment, the child will grow into a model citizen. Twenty years later, Roy comes back to live with Tim, and is appalled at his unscrupulous methods of conducting business. Then, he falls in love with Enid Winslow, the daughter of a social reformer who is running for office against Tim. Largely due to Roy's financial support, Winslow wins the election, but, holding a grudge against Tim and anyone connected to him, he refuses to let Enid marry Roy.